InLattice is a web-based service for companies to exchange and manage documents like invoices, purchase orders, sales receipts and payment information with customers and vendorEstimated Yearly Cost: $300.00(Free Trial Available)

With the Invoice Duplicator you can can create one sample invoice in QuickBooks and create a copy of it for all (or a select group) of your customers with a minimum of effort.Price: $49.00(Free Trial Available)

Levion is a free, easy to use QuickBooks application, providing online access to your local QuickBooks files through our sleek user interface. Every change made in Levion is made back on QuickBooks.Price: Free